diff --git a/src/packages/serializer/index.js b/src/packages/serializer/index.js
index 096c566c..562c1be6 100644
--- a/src/packages/serializer/index.js
+++ b/src/packages/serializer/index.js
@@ -715,7 +715,7 @@ class Serializer<T: Model> {
           domain,
           include: [],
           included: [],
-          formatRelationships: false
+          formatRelationships: true
         })
       );
     }
diff --git a/src/packages/serializer/test/serializer.test.js b/src/packages/serializer/test/serializer.test.js
index acd9417a..69565a68 100644
--- a/src/packages/serializer/test/serializer.test.js
+++ b/src/packages/serializer/test/serializer.test.js
@@ -556,7 +556,8 @@ describe('module "serializer"', () => {
             'id',
             'type',
             'links',
-            'attributes'
+            'attributes',
+            'relationships'
           ]);
 
           expect(item).to.have.property('id').and.be.a('string');
@@ -595,7 +596,8 @@ describe('module "serializer"', () => {
             'id',
             'type',
             'links',
-            'attributes'
+            'attributes',
+            'relationships'
           ]);
 
           expect(item).to.have.property('id').and.be.a('string');